\name{personKsi2}
\alias{personKsi2}
\title{Pearson ksi2 Statistic}
\description{
  Calculates Pearson ksi2 Statistic.
}
\usage{
personKsi2(rule, data)
}
\arguments{
  \item{rule}{a rule to test.}
  \item{data}{a data set used in calculation.}
}
